Thank you Smoak
Silent.link seems like a good choice based on responses
Discussion
I believe the data only is the way to go although I have no need for a number to register services as where I live, so cards are so cheap and come with a small bit of credit you can use them to register an app, throw it away and repeat.
Maybe there are better ways to do this?
Thank you. I'll keep investigating, going to dig into it tonight after work